ack/mach/powerpc/libem/build.lua
George Koehler 26de4c1ab1 Add test for EM _rck_. Fix traps in PowerPC ncg.
The new test rck_e.e segfaults on PowerPC unless I make some changes.
The inline code for _rck_ was wrong because it didn't allow the trap
handler to return.  _sig_ forgot to push the old trap handler.

Move plat/linuxppc/libsys/trap.s to mach/powerpc/libem/trp.s and
rewrite it with simplified/extended mnemonics.  Remove .trap alias for
.trp procedure.  Add a missing `mtspr lr, r0` so we can return from
the trap handler.  Call write() and _exit() so trp.s works with both
linuxppc and osxppc.  Before, Mac OS X was wrongly using the trap.s
for Linux.

In powerpc/libem, simplify .aar4; teach .csa and .csb to raise the
trap if the default target is zero.

C programs don't need these changes.  You may relink your C programs
with the changed .csa and .csb, but C code doesn't raise the trap.
Modula-2 code can raise traps, so you may want to relink your Modula-2
programs with the changed libem, but you might keep your old .o files
from Modula-2.  You may need to recompile your Pascal programs (delete
old .o files from Pascal) because the Pascal compiler might use _rck_.
2017-12-24 22:37:52 -05:00

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Lua

for _, plat in ipairs(vars.plats) do
acklibrary {
name = "headers_"..plat,
}
acklibrary {
name = "lib_"..plat,
srcs = {
"./*.s", -- trp.s
},
vars = { plat = plat },
deps = {
"h+emheaders",
"+headers_"..plat,
}
}
end